MADYMO used for computer aided design of a dynamic acting child restraint seat

Stalnaker, R. L.; Maltha, J.

Affiliations

¹Research Institute for Road Vehicles TNO, DELFT - The Netherlands

Abstract

A child restraint system based on a new concept was computer designed and optimized. This unique child restraint system is based on a moving impact shield. The shield is horizontal during normal use, so the child can have good forward visibility, but during a frontal collision the shield pivots upward to restrict the forward motion of the child's head and thorax. The first stage of this study was to design and optimize the actuating mechanism of the dynamic shield, In the second stage, the performance of the restraint system was optimized for the TNO-P3, 3-year-old child Dummy. The optimization of the design was carried out in both stages by varying the geometry, padding, and inertial properties, using the MADYMO Crash Victim Simulator. The final stage of the study was to perform sled tests to validate and refine the design of the system.

Cited Works (2)

Year	Entry
1979	Wismans J, Maltha J, Melvin JW, Stalnaker RL. Child restraint evaluation by experimental and mathematical simulation. In: Proceedings of the 23rd Stapp Car Crash Conference. October 17-19, 1979; San Diego, CA. Warrendale, PA: Society of Automotive Engineers:383-415. SAE 791017.
1980	Maltha J, Wismans J. MADYMO — crash victim simulations, a computorised research and design tool. In: Proceedings of the 1980 International IRCOBI Conference on the Biomechanics of Impact. September 9-11, 1980; Birmingham, England.1-13.

Cited By (6)

Year	Entry
1981	Wismans J, Maltha J, Stalnaker RL. Comparison study of two 3-year old child dummies: the Part 572 and the P3. In: 24th Annual Proceedings, Association for the Advancement of Automotive Medicine (AAAM). October 1-3, 1981; San Francisco, CA.397-406.
1985	Prasad P. Comparative evaluation of the MVMA2D and the MADYMO2D occupant simulation models with MADYMO-test comparisons. In: Proceedings of the 10th International Technical Conference on Experimental Safety Vehicles (ESV). July 1-4, 1985; Oxford, England.480-487. SAE 856067.
1985	Wismans J, Hoen T, Wittebrood L. Status of the MADYMO crash victim simulation package 1985. In: Proceedings of the 10th International Technical Conference on Experimental Safety Vehicles (ESV). July 1-4, 1985; Oxford, England.784-79. SAE 856092.
1980	Maltha J, Wismans J. MADYMO — crash victim simulations, a computorised research and design tool. In: Proceedings of the 1980 International IRCOBI Conference on the Biomechanics of Impact. September 9-11, 1980; Birmingham, England.1-13.
1981	Wismans J, Maltha J. Application of a three-dimensional mathematical occupant model for the evaluation of side impacts. In: Proceedings of the 1981 International IRCOBI Conference on the Biomechanics of Impact. September 8-10, 1981; Salon de Provence, France.331-341.
1982	Bastiaanse JC, Maltha J, Tak AGM. Evaluation of the dynamic test requirements for child restraints according to the ECE 44 regulation. In: Proceedings of the 1982 International IRCOBI Conference on the Biomechanics of Impact. September 8-10, 1982; Cologne, Germany.241-255.